# ========================
# Stage 1 - Builder
# ========================
FROM python:3.11-slim AS builder

# Install build dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    gcc \
    g++ \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy only requirements first (better caching)
COPY requirements.txt .

# Install dependencies
RUN pip install --no-cache-dir -r requirements.txt

# ========================
# Stage 2 - Final Runtime Image
# ========================
FROM python:3.11-slim

# Install minimal runtime dependencies
RUN apt-get update && apt-get install -y \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user
RUN useradd --create-home --shell /bin/bash appuser
WORKDIR /app

# Copy installed packages and application code
COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin
COPY . /app

# Set permissions
RUN chown -R appuser:appuser /app
USER appuser

# Expose port
EXPOSE 7860

# Set the working directory to the backend folder
WORKDIR /app

# Command to run the FastAPI app
CMD ["sh", "-c", "uvicorn api.app:app --host 0.0.0.0 --port 7860"]